module.exports = function (hljs) {
  return {
    aliases: ['patch'],
    contains: [
      {
        className: 'meta',
        relevance: 10,
        variants: [
          { begin: /^@@ +\-\d+,\d+ +\+\d+,\d+ +@@$/ },
          { begin: /^\*\*\* +\d+,\d+ +\*\*\*\*$/ },
          { begin: /^\-\-\- +\d+,\d+ +\-\-\-\-$/ }
        ]
      },
      {
        className: 'comment',
        variants: [
          { begin: /Index: /, end: /$/ },
          { begin: /={3,}/, end: /$/ },
          { begin: /^\-{3}/, end: /$/ },
          { begin: /^\*{3} /, end: /$/ },
          { begin: /^\+{3}/, end: /$/ },
          { begin: /\*{5}/, end: /\*{5}$/ }
        ]
      },
      {
        className: 'addition',
        begin: '^\\+',
        end: '$'
      },
      {
        className: 'deletion',
        begin: '^\\-',
        end: '$'
      },
      {
        className: 'addition',
        begin: '^\\!',
        end: '$'
      }
    ]
  }
}
